(1) A transparent observation port is provided to observe the changing state of the material at any time, but the transparent window is easily contaminated and affects the observation effect;
(2) Indirect judgment through current changes.
At the beginning of high mixing, due to inertia, the resistance is very large, and the power equipment is started with high load, causing the current to jump up instantly.After entering the normal constant speed operation, since the material is in a loose state and moves at a constant speed, the load of the power equipment is very light, and the current decreases accordingly. As the temperature increases, the dispersing wetting agent begins to melt gradually, and the adhesion state between the materials becomes more and more serious, which causes the motor load to increase. At this time, the current pointer gradually rises in a wave-like jitter.